CIRCUIT

The principle of Maximum Power Transfer dictates that for a source to deliver maximum power to a load, the load impedance must be equal to the complex conjugate of the source impedance. In practical power delivery systems, particularly those with dynamic or reactive loads, this condition is rarely met, leading to significant power loss and reduced system efficiency. This project addresses the challenge of impedance mismatch by designing and implementing a Smart Load Matching Circuit that utilizes a microcontroller-based system to dynamically adjust the transformer tap position. The system employs voltage and current sensors to measure real-time source and load parameters, allowing the central Arduino microcontroller to calculate the instantaneous impedance. Based on a predefined control algorithm, the Arduino activates a bank of Single-Pole Double-Throw (SPDT) relays to switch the multi-tap transformer to the optimal winding ratio, thereby achieving the closest possible impedance match. The primary objective is to maximize power transfer efficiency under varying load conditions. The implementation and testing of this circuit demonstrate a significant improvement in power transfer efficiency compared to a fixed-tap system, validating the use of smart, dynamic control in addressing impedance mismatch in power electronics.